Buddies 170 is a DOG!

wow something is sure dragging it down..... slack/wore/tired timing chain maybe...is the rear end holding it back wore out bearings on the pinion or axles brakes dragging, could the trans be dragging it down.
This year model trans has a external filter that looks like a gas filter..
Sorry pishta, I hope a good /6 tec can jump in here and shed some lite on this for you.